C Program to Find GCD of given Numbers using Recursion

Code:

#include   stdio.h

int gcd(int, int);

int main()
{
    int a, b, result;

    printf("Enter the two numbers to find their GCD: ");
    scanf("%d%d", &a, &b);
    result = gcd(a, b);
    printf("The GCD of %d and %d is %d.\n", a, b, result);
}

int gcd(int a, int b)
{
    while (a != b)
    {
        if (a > b)
        {
            return gcd(a - b, b);
        }
        else
        {
            return gcd(a, b - a);
        }
    }
    return a;
}}


Output:

Enter the two numbers to find their GCD: 100 70
The GCD of 100 and 70 is 10.


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